Once I spent about 30 minutes all told, they were on, and rock solid. its small its weak and the customer service is nonexistent. Es cierto que no son particularmente cómodos en escuchas prolongadas; pero no creo que se deba a que no cubren la oreja, como han dicho algunos, pues los Sennheiser PXC550 la cubren y también terminan haciéndose pesados, sobre todo por el calor que dan. From the Aiwa Exos 9, JBL Boombox and even the Soundboks 2. However I ordered a Big Kid lg (sz 3/4) when they arrived my husband immediately noticed that they looked small. I purchased two, because one would not span the full width of her closet. We bought a size bigger to allow my toddler some room for growth. We can go anywhere inside our 5,000 sq ft office building with them on. We like it so much we bought a second for the back entryway. La calamita dalla parte opposta dellauricolare è davvero forte e le tue cuffiette non si staccano se per caso fai un movimento brusco.